Cwm Elan
Elan Valley, Powys
Between 1893 and 1904, Birmingham built a chain of great dams in the Elan Valley to carry water 73 miles to the city. Around 100 people were moved out, and their houses, farms, school and chapel were drowned.
Read the full story, see it on the map, get directions and find what else is nearby in the free Hidden Britain Atlas map.
- When
- Flooded 1890s–1904
- Where
- 52.2700, -3.5800
- Group
- Lost & drowned villages
Visiting
The Elan Valley visitor centre has walks, cycle trails and views of the dams.

The Ledger of Lost Britain
The Romans arrived in AD 43. For most people that is where the history of Britain begins. But by the time the legions landed, people had already been living on these islands for thousands of years. They had hunted, farmed, mined flint, dragged stones across the country, raised a hill by hand, and buried their dead in great tombs. They left no written words. What they left was the ground itself. Every place in this book can be visited, or has been dug up, or is in a museum.
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